Tab to all form controls in OS X

Just recently found out how to fix a small annoyance I've had with OS X since day 1, and thought I'd share. By default when you're in a form, tabbing between controls, OS X limits the tabbing to text-like boxes, so elements such as checkboxes and submit buttons are skipped. This is unfortunately not the same behaviour as Linux (KDE at least) and Windows, so for those who come to OS X after another OS may find it frustrating to discover this fact, as I have.

The fix is trivial, and as always Apple provide the UI to do it for you (I should have looked harder to find it in the first place!):

System Preferences -> Keyboard & Mouse -> open the Keyboard Shortcuts tab.

At the bottom of the page there is an option, Full Keyboard Access. All you need do is switch the option to All controls from the default "Text boxes and lists only".

Done!